[PD] soft-edging with multiple projectors/GEM

cyrille henry ch at chnry.net
Thu Oct 21 11:37:04 CEST 2010


i don't have a ready made solution, but once you have a FB, nothing should be very complex.

unless i miss the complex part of the problem.

if i've got 5 min later tonight, i'll try to make a soft_edge shader that can deal with everything...


Le 21/10/2010 11:11, IOhannes m zmoelnig a écrit :
> On 2010-10-21 10:45, cyrille henry wrote:
>> hello,
>> one solution is to render your scene in a big framebuffer.
>> (if you use 3 screen of 1024x768, and a 100 pixel overlap, then you need
>> a 3x1024-2x100 pixel wide framebuffer)
>> then render this frambuffer as a texture on 3 rectangle, using
>> pix_coordinate in order to keep only the desire part of the image.
>> the black fade can be made with shader or texture as you prefer.
> afaik (being somewhat involved in the project), this is not really
> peter's problem.
> he is already rendering into a big framebuffer.
> the question is rather, whether someone has a ready-made solution for
> displaying the image on multiple overlapping projectors, that they want
> to share. (if it is simple enough, it could go into the Gem/examples/...
> think of all the fame!!!!)
> the last solution we used for that (on 8 overlapping projectors), had a
> proprietary license and could only be setup by the developers... so we
> are looking for something more simple and open.
> fgmasdr
> IOhannes
> PS: note the slight change in wording in my email, from "peter" in the
> beginning to "we" in the end. it's somewhat unintentional :-)
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